It's a clot in the radicular artery.

Here,you risk catching the radicular artery under the tumor.

We preserve the radicular branches as we go, especially Adamkiewicz...

I could go under the tumor here,but I might cut the radicular artery.

Harvest a radicular branch that doesn't have tumor involvement... Dead again.

Dead. Harvest a radicular branch that doesn't have tumor involvement... dead again.

We preserve the radicular branches as we go, especially Adamkiewicz... he's paralyzed if we go anywhere near the Adamkiewicz.